Get Table Headers from MySQL DB

<?php

    require("connect/connect.php");

     //Collecting table headers/col names
     $tblheaders = "SELECT COLUMN_NAME
     FROM INFORMATION_SCHEMA.COLUMNS
     WHERE TABLE_SCHEMA = 'dbname' AND TABLE_NAME = 'tbl_name';";
     $stmt = $pdo->query($tblheaders);
     $results = $stmt->fetchAll();

    echo "<pre>"
    print_r($results);

?>